Push-to-open device

A push-to-open device mounted on a slide device having a fixed rail and a movable rail slidably installed on the fixed rail, the push-to-open device comprising:

• a main body mounted on the fixed rail and having a guide path and an internal space;
• a slider that is provided on the main body to be locked with or unlocked from a locking member of the movable rail and moves along the guide path;
• a shaft of which one end is connected to the slider and the other end is connected to an elastic member provided in the main body and which has a plurality of operation protrusions protruding from an outer circumferential surface thereof and a plurality of locking protrusions protruding from positions spaced a predetermined distance from the operation protrusions in a lengthwise direction;
• a rotator that is provided in the main body, rotates in one direction while engaged with the operation protrusion by movement of the shaft during a pushing operation, and accordingly, is repeatedly locked with and unlocked from the locking protrusion;
• and
• the elastic member that is provided in the main body, elastically supports a locking or unlocking operation of the shaft and the rotator,
• wherein the rotator includes:
• a plurality of ratchet protrusions formed in an “H” shape on an inner circumferential surface of the rotator;
• and
• a plurality of passages formed between the ratchet protrusions.